FreschetValverde-BarrantesTuckerEtAl2017

Référence

Freschet, G.T., Valverde-Barrantes, O.J., Tucker, C.M., Craine, J.M., McCormack, M.L., Violle, C., Fort, F., Blackwood, C.B., Urban-Mead, K.R., Iversen, C.M., Bonis, A., Comas, L.H., Cornelissen, J.H.C., Dong, M., Guo, D., Hobbie, S.E., Holdaway, R.J., Kembel, S.W., Makita, N., Onipchenko, V.G., Picon-Cochard, C., Reich, P.B., de la Riva, E.G., Smith, S.W., Soudzilovskaia, N.A., Tjoelker, M.G., Wardle, D.A. and Roumet, C. (2017) Climate, soil and plant functional types as drivers of global fine-root trait variation. Journal of Ecology, 105(5):1182-1196. (Scopus )

Résumé

Ecosystem functioning relies heavily on below-ground processes, which are largely regulated by plant fine-roots and their functional traits. However, our knowledge of fine-root trait distribution relies to date on local- and regional-scale studies with limited numbers of species, growth forms and environmental variation. We compiled a world-wide fine-root trait dataset, featuring 1115 species from contrasting climatic areas, phylogeny and growth forms to test a series of hypotheses pertaining to the influence of plant functional types, soil and climate variables, and the degree of manipulation of plant growing conditions on species fine-root trait variation. Most particularly, we tested the competing hypotheses that fine-root traits typical of faster return on investment would be most strongly associated with conditions of limiting versus favourable soil resource availability. We accounted for both data source and species phylogenetic relatedness. We demonstrate that: (i) Climate conditions promoting soil fertility relate negatively to fine-root traits favouring fast soil resource acquisition, with a particularly strong positive effect of temperature on fine-root diameter and negative effect on specific root length (SRL), and a negative effect of rainfall on root nitrogen concentration; (ii) Soil bulk density strongly influences species fine-root morphology, by favouring thicker, denser fine-roots; (iii) Fine-roots from herbaceous species are on average finer and have higher SRL than those of woody species, and N2-fixing capacity positively relates to root nitrogen; and (iv) Plants growing in pots have higher SRL than those grown in the field. Synthesis. This study reveals both the large variation in fine-root traits encountered globally and the relevance of several key plant functional types and soil and climate variables for explaining a substantial part of this variation. Climate, particularly temperature, and plant functional types were the two strongest predictors of fine-root trait variation. High trait variation occurred at local scales, suggesting that wide-ranging below-ground resource economics strategies are viable within most climatic areas and soil conditions. © 2017 The Authors. Journal of Ecology © 2017 British Ecological Society

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@ARTICLE { FreschetValverde-BarrantesTuckerEtAl2017,
    AUTHOR = { Freschet, G.T. and Valverde-Barrantes, O.J. and Tucker, C.M. and Craine, J.M. and McCormack, M.L. and Violle, C. and Fort, F. and Blackwood, C.B. and Urban-Mead, K.R. and Iversen, C.M. and Bonis, A. and Comas, L.H. and Cornelissen, J.H.C. and Dong, M. and Guo, D. and Hobbie, S.E. and Holdaway, R.J. and Kembel, S.W. and Makita, N. and Onipchenko, V.G. and Picon-Cochard, C. and Reich, P.B. and de la Riva, E.G. and Smith, S.W. and Soudzilovskaia, N.A. and Tjoelker, M.G. and Wardle, D.A. and Roumet, C. },
    TITLE = { Climate, soil and plant functional types as drivers of global fine-root trait variation },
    JOURNAL = { Journal of Ecology },
    YEAR = { 2017 },
    VOLUME = { 105 },
    NUMBER = { 5 },
    PAGES = { 1182-1196 },
    NOTE = { cited By 2 },
    ABSTRACT = { Ecosystem functioning relies heavily on below-ground processes, which are largely regulated by plant fine-roots and their functional traits. However, our knowledge of fine-root trait distribution relies to date on local- and regional-scale studies with limited numbers of species, growth forms and environmental variation. We compiled a world-wide fine-root trait dataset, featuring 1115 species from contrasting climatic areas, phylogeny and growth forms to test a series of hypotheses pertaining to the influence of plant functional types, soil and climate variables, and the degree of manipulation of plant growing conditions on species fine-root trait variation. Most particularly, we tested the competing hypotheses that fine-root traits typical of faster return on investment would be most strongly associated with conditions of limiting versus favourable soil resource availability. We accounted for both data source and species phylogenetic relatedness. We demonstrate that: (i) Climate conditions promoting soil fertility relate negatively to fine-root traits favouring fast soil resource acquisition, with a particularly strong positive effect of temperature on fine-root diameter and negative effect on specific root length (SRL), and a negative effect of rainfall on root nitrogen concentration; (ii) Soil bulk density strongly influences species fine-root morphology, by favouring thicker, denser fine-roots; (iii) Fine-roots from herbaceous species are on average finer and have higher SRL than those of woody species, and N2-fixing capacity positively relates to root nitrogen; and (iv) Plants growing in pots have higher SRL than those grown in the field. Synthesis. This study reveals both the large variation in fine-root traits encountered globally and the relevance of several key plant functional types and soil and climate variables for explaining a substantial part of this variation. Climate, particularly temperature, and plant functional types were the two strongest predictors of fine-root trait variation. High trait variation occurred at local scales, suggesting that wide-ranging below-ground resource economics strategies are viable within most climatic areas and soil conditions. © 2017 The Authors. Journal of Ecology © 2017 British Ecological Society },
    AFFILIATION = { Centre d'Ecologie Fonctionnelle et Evolutive, UMR 5175 (CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE), 1919 route de Mende, Montpellier, France; Department of Biological Sciences, Kent State University, Kent, OH, United States; Jonah Ventures, Manhattan, KS, United States; Department of Plant Biology, University of Minnesota, 1445 Gortner Avenue, St. Paul, MN, United States; INRA, UMR 1248 AGIR, Centre de recherche de Toulouse, CS 52627, Castanet-Tolosan Cedex, France; Climate Change Science Institute and Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; UMR 6553 ECOBIO: Ecosystems, Biodiversity, Evolution, CNRS-University of Rennes 1, OSU Rennes, Rennes, France; USDA-ARS Water Management Research Unit, 2150 Centre Avenue, Bldg D Suite 320, Fort Collins, CO, United States; Systems Ecology, Department of Ecological Sciences, Vrije Universiteit, de Boelelaan 1085, Amsterdam, Netherlands; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; Department of Ecology, Evolution and Behavior, University of Minnesota, St. Paul, MN, United States; Landcare Research, PO Box 69040, Lincoln, New Zealand; Département des sciences biologiques, Université du Québec à Montréal, Montréal, QC, Canada; Graduate School of Agriculture, Kyoto University, Kyoto, Japan; Department of Geobotany, Faculty of Biology, Moscow State Lomonosov University, Moscow, Russian Federation; INRA, UR874, Grassland Ecosystem Research Team, 5 chemin de Beaulieu, Clermont-Ferrand, France; Department of Forest Resources, University of Minnesota, St. Paul, MN, United States; Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, Australia; Área de Ecologia, Facultad de Ciencias, Universidad de Cordoba, Cordoba, Spain; Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway; Conservation Biology Department, Institute of Environmental Sciences, CML, Leiden University, Einsteinweg 2, Leiden, Netherlands; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umea, Sweden; International Center for Tropical Botany, Department of Biological Sciences, Florida International University, 11200 SW 8th Street, OE 243, Miami, FL, United States },
    AUTHOR_KEYWORDS = { climate; database; fine roots; functional biogeography; functional traits; N2-fixation; phylogeny; plant growth form; plant resource economics; soil properties },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1111/1365-2745.12769 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85017479036&doi=10.1111%2f1365-2745.12769&partnerID=40&md5=dbf607419f46d16eee2cf9cbc29c3f71 },
}

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